SiYuan Note - Cross-Site Scripting Detection

SiYuan Note through version 3.6.1 is vulnerable to unauthenticated reflected Cross-Site Scripting XSS in the /api/icon/getDynamicIcon endpoint due to improper filtering of SVG elements with a namespace prefix such as . By using a namespaced script element, attackers can bypass the SanitizeSVG...

CVE-2026-32940: Improper Neutralization of Input During Web Page Generation

SiYuan is a personal knowledge management system. In versions 3.6.0 and below, SanitizeSVG has an incomplete blocklist — it blocks data:text/html and data:image/svg+xml in href attributes but misses data:text/xml and data:application/xml, both of which can render SVG with JavaScript execution. Th...

CVE-2026-31809: Improper Neutralization of Input During Web Page Generation

SiYuan is a personal knowledge management system. Prior to 3.5.10, SiYuan's SVG sanitizer SanitizeSVG checks href attributes for the javascript: prefix using strings.HasPrefix. However, inserting ASCII tab , newline , or carriage return characters inside the javascript: string bypasses this prefi...

CVE-2026-23847: Improper Neutralization of Input During Web Page Generation

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons type=8. The content query parameter is inserted directly into the S...